<?php
/**
 * This is Arhim helper. 
 *
 * @copyright     Copyright 2008-2010, LilCake.net
 * @link          http://lilcake.net LilCake.net
 */
/**
 * ArhimHelper class
 *
 * @uses          Helper
 */
class LilBlogsHelper extends AppHelper {
/**
 * helpers property
 *
 * @var array
 * @access public
 */
	var $helpers = array('Html', 'Text');
/**
 * permaLink method
 *
 * @param string $blog_name
 * @param mixed $post
 * @param array $options
 * @access public
 * @return void
 */
	function permalink($blog_name, $post, $options = array()) {
		$default_options = array(
			'caption' => $post['Post']['title']
		);
		$options = array_merge($default_options, (array)$options);
		
		return $this->Html->link($options['caption'], array(
			'admin'      => false,
			'plugin'     => 'lil_blogs',
			'controller' => 'posts',
			'action'     => 'view',
			'blogname'   => $blog_name,
			'post'       => $post['Post']['slug']
		));
	}
/**
 * function exceprt
 * 
 * Extracts excerpt from text
 *
 * @param string $body
 * @param int $max_length
 * @param string $page_delimiter 
 * @return string
 * @access public
 * @static
 */
	function excerpt($body = null, $max_length = 300, $page_delimiter='<!-- -- -->') {
		$ret = '';
		if (stripos($body, $page_delimiter) !== false) {
			$ret = substr($body, 0, stripos($body, $page_delimiter));
		} else {
			$ret = $this->Text->truncate($body, $max_length, '...', false, true);
		}
		return $ret;
	}
/**
 * Replaces double line-breaks with paragraph elements.
 *
 * A group of regex replaces used to identify text formatted with newlines and
 * replace double line-breaks with HTML paragraph tags. The remaining
 * line-breaks after conversion become <<br />> tags, unless $br is set to '0'
 * or 'false'.
 *
 * @since 0.71
 *
 * @param string $pee The text which has to be formatted.
 * @param int|bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true.
 * @return string Text which has been converted into correct paragraph tags.
 */
	function autop($pee, $br = 1) {
	
		if ( trim($pee) === '' )
			return '';
		$pee = $pee . "\n"; // just to make things a little easier, pad the end
		$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
		// Space things out a little
		$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
		$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
		$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
		$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
		if ( strpos($pee, '<object') !== false ) {
			$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
			$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
		}
		$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
		// make paragraphs, including one at the end
		$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
		$pee = '';
		foreach ( $pees as $tinkle )
			$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
		$pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
		$pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);
		$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
		$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
		$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
		$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
		$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
		$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
		if ($br) {
			$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', '_lilblogs_autop_newline_preservation_helper', $pee);
			$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
			$pee = str_replace('<PreserveNewline />', "\n", $pee);
		}
		$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
		$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
		if (strpos($pee, '<pre') !== false)
			$pee = preg_replace_callback('!(<pre[^>]*>)(.*?)</pre>!is', '_lilblogs_clean_pre', $pee );
		$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
	
		return $pee;
	}
}

function _lilblogs_autop_newline_preservation_helper( $matches ) {
	return str_replace("\n", "<PreserveNewline />", $matches[0]);
}

function _lilblogs_clean_pre($matches) {
	if ( is_array($matches) )
		$text = $matches[1] . $matches[2] . "</pre>";
	else
		$text = $matches;

	$text = str_replace('<br />', '', $text);
	$text = str_replace('<p>', "\n", $text);
	$text = str_replace('</p>', '', $text);

	return $text;
}